Unknown qdisc "netem"

Unknown qdisc "netem"

[carlo.altarelli]

i'm tring to use netem under a 2.6.8.1 kernel,
the error report is : "Unknown qdisc netem", 
I've just rebuild the kernel with these options about QoS:

# QoS and/or fair queueing
#
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CLK_JIFFIES=y
# CONFIG_NET_SCH_CLK_GETTIMEOFDAY is not set
# CONFIG_NET_SCH_CLK_CPU is not set
CONFIG_NET_SCH_CBQ=y
CONFIG_NET_SCH_HTB=y
CONFIG_NET_SCH_HFSC=y
CONFIG_NET_SCH_PRIO=y
CONFIG_NET_SCH_RED=y
CONFIG_NET_SCH_SFQ=y
CONFIG_NET_SCH_TEQL=y
CONFIG_NET_SCH_TBF=y
CONFIG_NET_SCH_GRED=y
CONFIG_NET_SCH_DSMARK=y
CONFIG_NET_SCH_NETEM=y
CONFIG_NET_SCH_INGRESS=y
CONFIG_NET_QOS=y
CONFIG_NET_ESTIMATOR=y
CONFIG_NET_CLS=y
CONFIG_NET_CLS_TCINDEX=y
CONFIG_NET_CLS_ROUTE4=y
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
# CONFIG_CLS_U32_PERF is not set
# CONFIG_NET_CLS_IND is not set
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
# CONFIG_NET_CLS_ACT is not set
CONFIG_NET_CLS_POLICE=y

it's seems that the sch_netem is not present in the file system!

Tanks,
Carlo Altarelli

Re: Unknown qdisc "netem"

[shemminger]

> i'm tring to use netem under a 2.6.8.1 kernel,
> the error report is : "Unknown qdisc netem",
> I've just rebuild the kernel with these options about QoS:
>

More likely the problem is out of date versions of tc or picking up
the wrong version of tc from the PATH. Some distro's put tc in /sbin
but the current iproute2 'make install' puts it in /usr/sbin.  With
the latest iproute2 the netem support is in the shared library
/usr/lib/tc/q_netem.so. I could have built it into tc but wanted to
use netem as test case for the extensiblity with shared libraries,
and it solves build/link issues with older kernels.